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Jeongwon Yang,Ploypin Chuenterawong,Krittaphat Pugdeethosapol 글로벌지식마케팅경영학회 2023 Global Marketing Conference Vol.2023 No.07
In recent years, social media influencers (SMIs) have brought dramatic shifts to the marketing trend. Apart from product endorsement and ad campaigns, they are increasingly hired by brands for promoting social causes including Black Lives Matter movement, COVID-19, and LGBTQ+ issues owing to their perceived authenticity and expertise (Open Influence, 2022). As such, brands promoting social causes to take ethical obligations to the society, namely, corporate social responsibility (CSR), has become an indispensable business practice (McWilliams & Siegel, 2001). Accordingly, past studies revealed that SMIs’ capability of creating authentic connection with target consumers and the fact that stakeholder awareness and authentic motives are preconditions for the success of CSR initiatives can create a synergic effect (Yang et al., 2021).
Logistic Regression for Investigation Credit Card Default
Yang, Jeongwon,Sung Ho Ha,Min, JiHong 한국산업정보학회 2008 한국산업정보학회 학술대회논문집 Vol.2008 No.10
The increasing late-payment rate of credit card customers caused by a recent economic downturn are incurring not only reduced profit of department stores but also significant loss. Under this pressure, the objective of credit forecasting is extended from presumption of good or bad customers to contribution to revenue growth. As a method of managing defaults of department store credit card, this study classifies credit delinquents into some clusters, analyzes repaying patterns of customers in each cluster, and develops credit forecasting system to manage delinquents of department store’s delinquents. The model presented by this study uses Kohonen network, a kind of artificial neural network of data mining techniques to cluster credit delinquents into groups. Logistic regression model is also used to predict repayment rate of customers of each cluster per period. The accuracy of presented system for the whole clusters is 92.3%.
Trapping of Microparticles in Cylindrical Standing Wave Fields
Yang, Jeongwon,Hwang, Haerang,Bae, Young Min,Kim, Moojoon,Ha, Kanglyeol IOP Publishing 2013 Japanese journal of applied physics Vol.52 No.7
<P>In this study, in order to determine the positions where microparticles are trapped in a cylindrical standing wave field, we derived equations giving the radiation force and potential energy distribution. Then, the trapped pattern and its variation with time in a hollow cylindrical transducer were simulated. The simulation results showed that polystyrene particles moved to and aggregated near positions corresponding to pressure nodes, which were estimated from the derived equations. These were confirmed by measurement. In addition, it was demonstrated that biological particles of the green algae chlorella show similar trapping phenomena to polystyrene particles. (c) 2013 The Japan Society of Applied Physics</P>
Jeongwon Han,Jung Mo Yang,Sang Chul Shin,Young-Joo Kim,Shinill Kang IEEE 2009 IEEE transactions on magnetics Vol.45 No.5
<P>Perpendicular patterned magnetic media have been regarded as a one of candidate to achieve an ultrahigh density magnetic data storage media of over 1 Tb/in<SUP>2</SUP> . One approach to producing patterned magnetic media is deposition of thin magnetic films on pre-etched nano pillar array prepared with nanoimprinting technology. In this paper, we have investigated the feasibility of the polymeric nano pillar patterns on glass substrate, which were replicated by UV nanoimprinting process with the polymeric nanostamp, and magnetic layer deposition technology without additional etching process to fabrication for perpendicular patterned magnetic media. The polymeric nano pillar patterns were replicated by 2-step UV nanoimprinting process by using a silicon nanomaster with nano pillar patterns. We deposited magnetic layers on the nanoimprinted nano pillar patterns to make the perpendicular patterned magnetic media. Finally, we show that the fabricated magnetic media could be used for perpendicular patterned magnetic media by measurement of magnetic characteristics.</P>
Crystal structure of LRG1 and the functional significance of LRG1 glycan for LPHN2 activation
Yang Jimin,Yin Guo Nan,Kim Do-Kyun,Han Ah-reum,Lee Dong Sun,Min Kwang Wook,Fu Yaoyao,Yun Jeongwon,Suh Jun-Kyu,Ryu Ji-Kan,Kim Ho Min 생화학분자생물학회 2023 Experimental and molecular medicine Vol.55 No.-
The serum glycoprotein leucine-rich ɑ-2-glycoprotein 1 (LRG1), primarily produced by hepatocytes and neutrophils, is a multifunctional protein that modulates various signaling cascades, mainly TGFβ signaling. Serum LRG1 and neutrophil-derived LRG1 have different molecular weights due to differences in glycosylation, but the impact of the differential glycan composition in LRG1 on its cellular function is largely unknown. We previously reported that LRG1 can promote both angiogenic and neurotrophic processes under hyperglycemic conditions by interacting with LPHN2. Here, we determined the crystal structure of LRG1, identifying the horseshoe-like solenoid structure of LRG1 and its four N-glycosylation sites. In addition, our biochemical and cell-biological analyses found that the deglycosylation of LRG1, particularly the removal of glycans on N325, is critical for the high-affinity binding of LRG1 to LPHN2 and thus promotes LRG1/LPHN2-mediated angiogenic and neurotrophic processes in mouse tissue explants, even under normal glucose conditions. Moreover, the intracavernous administration of deglycosylated LRG1 in a diabetic mouse model ameliorated vascular and neurological abnormalities and restored erectile function. Collectively, these data indicate a novel role of LRG1 glycans as molecular switches that can tune the range of LRG1’s cellular functions, particularly the LRG1/LPHN2 signaling axis.